Information of this kind of mould: Mould Life:3,000,000 shots Mould Cavities:Multiple Cavities,can be customized Runner Type:Cold runner,Semi Hot Runner Mould Steel:Core and cavities:S136/Cr12/DC53 Base:60#/5GrNiMo/4Cr13 (the Mould steel can be customized as well) Product material:PP/PE Welcome to visit https://www.syringemachinery.com/product/medical-mould/syringe-plunger-mould-bottom.html to get more product information~